The digastric muscle is a small muscle located in the neck, just below the lower jaw. The anterior belly of the digastric muscle originates from the inner front part of . The nerve supply for the digastric muscle is provided by two cranial nerves. The digastric branch of the facial nerve (CN VII) innervates the posterior belly, while the mylohyoid nerve, a branch of the mandibular nerve (CN V3) supplies the anterior belly of the digastric muscle.
The facial nerve is associated with the derivatives of the second pharyngeal arch: Motor – muscles of facial expression, posterior belly of the digastric, stylohyoid and stapedius muscles. Sensory – a small area around the concha of the external ear/5(). Oct 11, · The facial nerve innervates the posterior belly of the paired digastric muscle. The digastric muscle is a loop of muscle under the jaw with two bands of muscle (bellies) connected by a tendon. Both bellies are essential for complex jaw movement and also lift the tongue bone when we swallow.
Jul 22, · The digastric muscle, also referred to as the digastricus, is a small muscle situated under the jaw. The primary function of this muscle is to elevate the hyoid bone - a small, horseshoe shaped bone located between the thyroid cartilage and chin. Dec 08, · The digastric muscle is often pinpointed as the source in people experiencing jaw, throat, tooth, and general facial pain. The muscle, having two portions separately innervated by different branches of cranial nerves and operating a complex tendon pulley, is .